 Because it's still going super fast and it's still going to have quite a wallop to it. You ever take a hammer and slam it into something steel? It makes a lot of noise because it's the same kind of thing. So the suppressor laws don't make a lot of sense. In fact, in some countries you can go to the hardware store and buy a suppressor. Like, I'll take that one and they'll freaking ring it up and you can put it in your little bag and leave with it.